Leonardo DiCaprio's eco-friendly holiday resort

The Hollywood heartthrob is now planning to transform Blackadore Caye, a 104-acre island off the coast of Belize, into a luxury, eco-friendly holiday resort.

A source revealed: "Leo wants to make money without destroying the environment. Energy sources will be renewable and it will be self-sustaining."

Protecting the environment is an issue close to the actor's heart, and he even drives an electric car, a Toyota Prius.

Leonardo recently helped launch a campaign to raise awareness about the billions of the world's population without access to clean water.

The 'Titanic' star signed a petition pressuring American President George W. Bush and other government leaders to commit to a legally binding United Nations treaty, which declares clean water as a basic human right.

Speaking on World Water Day at the end of last year, DiCaprio said: "We are here to help raise awareness about what is one of the greatest challenges facing humanity today."

Leonardo then screened 'Water Planet', a short film he helped produce, which highlights the need to conserve the world's limited supply of fresh water and provide greater access to it for more than 1.2billion people.

The actor is also stockpiling his money so he can make huge charity donations in the next 20 years - some of which will go to environmental causes.

He said recently: "Money is very important to me because it allow me the freedom to choose what I want to do as an actor and most importantly because I want to

accumulate enough so that one day I can do something really great for other people, for the environment or for children."